#include <iostream>
#include <pthread.h>
#include <string>
#include <unistd.h>

pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;

void *active(void *arg)
{
    std::string name = static_cast<const char*>(arg);
    while(true)
    {
        pthread_mutex_lock(&mutex);
        // 没有对于资源是否就绪的判定
        pthread_cond_wait(&cond, &mutex); // mutex??
        printf("%s is active!\n", name.c_str());
        pthread_mutex_unlock(&mutex);
    }
    
}

int main()
{
    pthread_t tid1, tid2, tid3;

    pthread_create(&tid1, nullptr, active, (void*)"thread-1");
    pthread_create(&tid2, nullptr, active, (void*)"thread-2");
    pthread_create(&tid3, nullptr, active, (void*)"thread-3");

    sleep(1);
    printf("Main thread ctrl begin...\n");

    while(true){
        printf("main wakeup thread...\n");
        // pthread_cond_signal(&cond);
        pthread_cond_broadcast(&cond);
        sleep(1);
    }

    pthread_join(tid1, nullptr);
    pthread_join(tid2, nullptr);
    pthread_join(tid3, nullptr);

    return 0;
}